31716420 has 48 divisors (see below), whose sum is σ = 89130048. Its totient is φ = 8426880.

The previous prime is 31716397. The next prime is 31716427. The reversal of 31716420 is 2461713.

It is not an unprimeable number, because it can be changed into a prime (31716427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19062 + ... + 20658.

It is an arithmetic number, because the mean of its divisors is an integer number (1856876).

Almost surely, 2^31716420 is an apocalyptic number.

31716420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31716420 is an abundant number, since it is smaller than the sum of its proper divisors (57413628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31716420 is a wasteful number, since it uses less digits than its factorization.

31716420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1940 (or 1938 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 31716420 is about 5631.7333033445. The cubic root of 31716420 is about 316.5396030695.

It can be divided in two parts, 3171 and 6420, that added together give a triangular number (9591 = T₁₃₈).

The spelling of 31716420 in words is "thirty-one million, seven hundred sixteen thousand, four hundred twenty".